This blog was written by Saryu Vatal, Senior Consultant and Researcher for BSRIA Sustainable Construction Group

The BSRIA Residential Network was launched on the 11th of September, kindly hosted by the Wellcome Trust and well attended by over 50 delegates, comprising of both members and invited guests. Ian Orme Business Manager for the Sustainable Construction Group welcomed the delegates and introduced briefly the intention of the network and how BSRIA would like to engage with all stakeholders to help make residential development better.

The day started with a summary of the current policy context for energy efficiency standards in new homes and challenges and opportunities for low energy retrofits.

The recently concluded Performance Gap project for the DCLG provided a starting point for discussing issues that impacted new build residential developments. For this project, an extensive evidence gathering and review exercise was carried and over 60 issues were identified as contributing to the gap between the designed and measured energy use in homes. Of these the ones prioritised for action and further research, along with the shortcomings in skills and knowledge highlighted through the end-to-end process review of over 20 new developments, formed the core of the Hub’s recommendations to the Government.

Rick Holland was present to give an update on the Government’s continued support for funding research into construction processes via Innovate UK (previously Technology Strategy Board), both for domestic and non-domestic buildings.

A major programme from this funding stream looking at Building Performance Evaluation is coming to a close at the end of September and early stage findings from meta-data analysis were presented by Ian Mawditt of Fourwalls. This focused on the common issues found with the design, installation and operation of MVHR systems and data from whole house co-heating tests. The final findings will be disseminated via Innovate UK and will include information from all projects across the seven funding tranches.

The analysis of key design specifications that would impact the performance of the mechanical ventilation systems raised some interesting observations about common assumptions made at early design stages. Common themes from the commissioned air flow rates were also discussed. The performance of homes built to Passivhaus standard was notably better, which emphasised the importance of process control on site, but also highlighted the fact that, when needed, the industry was able to deliver a high quality product (homes).

The presentations of the day concluded with a summary of how BSRIA would like to engage with its members to try and address various shortcomings identified through research. Members are invited to put forward areas where there is a need for additional support, in the form of training, guidance and impartial technical expertise.

A panel discussion was facilitated by the event chair in which a range of topics were discussed. These included issues around the effective design, installation and modelling of district heating in residential and mixed use schemes and variations in standards and assumptions between the EU and the UK. Ashley Bateson was able to provide an update on standards being developed by CIBSE.

The conflict between supporting innovative technology and the confidence in product and performance data to allow these to be accepted into mainstream and within compliance tools was also highlighted as an area of concern.

The impact of users on the actual energy performance in homes has not been included in some key research projects although in reality this has significant impact. While this lies beyond the scope of a developer’s influence, key decisions about the complexity of services, controls interface and handover procedures all contribute towards the usability of homes. Instances of how internet based tools and were successfully employed in some projects to engage with occupants to develop a feedback and learning mechanism were highlighted.

There were concerns voiced about the problem of overheating in new and newly refurbished homes, especially when dealing with vulnerable occupant groups like the elderly. The Zero Carbon Hub are working on a project looking at the evidence and aim to help develop the assessment standards and methods for evaluating and mitigating risks in new homes.

BSRIA sees itself well-placed to engage with its members and the wider industry to help address the various shortcomings and areas of concern highlighted. Subsequent network events have been planned to focus on specific topics in detail and we are seeking feedback from members to help structure our efforts in the most effective and useful manner.

Presentations from all speakers can be found on the networks page of the BSRIA website.

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